On the motion of particles in a plasma and in plasma sheaths in the absence of external forces
On the motion of particles in a plasma and in plasma sheaths in the absence of external forces
复制标题
在没有外力的情况下等离子体和等离子体鞘中粒子的运动
DOI：
10.1088/0022-3727/36/22/013
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
G. Morfill
中科院分区：
文献类型：
--
作者：
B. Annaratone;G. Morfill
在几个不同的等离子体反应器中，在等离子体边缘的区域中已经观察到了“无”粒子。虽然很难解释为什么球体，即使有正确的初始边界条件，出现“无摩擦”，它似乎是可能的圆柱体，给定正确的“攻角”，在等离子体鞘的离子流冲浪。然而，连续运动的圆柱体也被观察到在主等离子体中的实验中，其中重力是由热泳补偿。在一般情况下，我们得出结论，不对称形状的颗粒可以达到高的极限速度独立的初始边界条件。其他的“空心”形状，其德拜长度的数量级的结构具有不同的收集区域的离子和中性粒子，并可能达到甚至更高的极限速度。
'Frictionless' particles have been observed in regions at the edge of plasma in several different plasma reactors. Whilst it is difficult to explain why spheres, even with the right initial boundary conditions, appear 'frictionless', it seems possible for cylinders, given the right 'angle of attack' to surf in the ion stream of the plasma sheath. However, continuous motion of cylinders has also been observed in the main plasma in an experiment in which gravity was compensated by thermophoresis. In general, we conclude that particles of asymmetric shapes may reach high limit velocities independent of the initial boundary conditions. Other 'hollow' shapes which structures of the order of the Debye length have different collection areas for ions and neutrals and may reach even higher limit velocities.